add linux

docs/linux/add-user.md

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+# Add User to Linux
+
+To add a user to a Linux system use the add user command:
+
+```bash
+sudo adduser username
+```
+
+To enable sudo privileges for the user, add the user to the sudo group:
+
+```bash
+sudo usermod -aG sudo username
+```
+
+To setup a ssh key for the user, switch to the user and create the .ssh directory:
+
+```bash
+sudo su - username
+mkdir ~/.ssh
+chmod 700 ~/.ssh
+```
+
+Then create the authorized_keys file and add the public key:
+
+```bash
+touch ~/.ssh/authorized_keys
+chmod 600 ~/.ssh/authorized_keys
+vim ~/.ssh/authorized_keys
+```
+
+Paste the public key into the file and save it. The user should now be able to log in using the ssh key.
+
+To enable sudo without a password, edit the sudoers file:
+
+```bash
+sudo visudo
+```
+
+Add the following line to the end of the file:
+
+```bash
+username ALL=(ALL) NOPASSWD:ALL
+```

docs/linux/index.md

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+# Linux Snippets and Musings
+
+#### [Add User to Linux](./add-user.md)